[FLEX-27987] Null reference in the focusInHandler

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Affects Version/s: Adobe Flex SDK 4.5.1 (Release)
• Fix Version/s: Apache Flex 4.10.0
• Component/s: Spark: Scroller
• Labels: easyfix easytest
• Environment: Affected OS(s): Windows; Affected OS(s): Windows 7; Language Found: English
• Assignee: Unassigned
• Reporter: Adobe JIRA
• Created: 01/Aug/11 06:24
• Updated: 03/May/13 04:12
• Resolved: 03/May/13 04:12

Description

You can test it in the test application I appended.

Steps to reproduce:
1. Create a List with buttons in the ItemRenderer
2. Dispatch an event with the click on the button
3. In the main application listen for this event and change the state
4. Switch to another window and back to the application

Actual Results:
A null reference error is thrown in the focusInHandler of the Scroller class because the focusManager is null and there is no check if it isn't null.

Expected Results:
No error should be thrown.